Etymology of Moded

It's California in the 1980s, and—uh-oh!—you're outsmarted or caught doing something stupid and someone else says, "Ooooooooooo, moded!" This Schadenfreudian slip of an expression was sometimes accompanied by a chin-stroking gesture, or elaborated still further as "Moded, corroded, your booty exploded!" Grant has the goods on this expression's likely origin. Check out his entry for it-- and the comments of people who know the term--at his dictionary site. This is part of a complete episode.